package util;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * @author shkstart
 * @create 2023-01-06-16:26
 */
public class DBUtils {
    private static volatile MysqlDataSource mysqlDataSource;

    public static MysqlDataSource getMysqlDataSource(){
        if(mysqlDataSource==null){
            synchronized (DBUtils.class){
                if(mysqlDataSource==null){
                    mysqlDataSource = new MysqlDataSource();
                    mysqlDataSource.setURL("jdbc:mysql://127.0.0.1:3306/myblog2022?characterEncoding=utf8&useSSL=false");
                    mysqlDataSource.setUser("root");
                    mysqlDataSource.setPassword("12345678");
                }
            }
        }
        return mysqlDataSource;
    }
    /*
    非单例模式
     */
    public static Connection getConnection() throws SQLException {
        Connection connection = (Connection) getMysqlDataSource().getConnection();
        return connection;
    }
    public static void close(ResultSet resultSet, PreparedStatement statement,Connection connection) throws SQLException {
        if(resultSet != null) resultSet.close();
        if(statement != null) statement.close();
        if(connection != null) connection.close();

    }

}
